Segment Reporting - Geographic Revenue (Details)	Dec. 31, 2012	Dec. 31, 2011
Domestic
Geographic Revenue Sales	72.00%	63.00%
Foreign
Geographic Revenue Sales	28.00%	37.00%

The percentage of net product revenue to total net revenue from the sale of goods as of year end.

No definition available.

Name:	us-gaap_SalesRevenueGoodsNetPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant